Typewriting machine



E. B. HESS TYPEWRI TING MACHI NE Filed May 5, 1924 Patented Dec. 2,1924.

PATENT orifice.

EDWARD a. HESS, on NEW YORK, 1v. Y., nssrenon T0 ROYAL rrrnwnrrnnCOMPANY, me, or NEW YORK, N. Y A CORPORATION or NEW YORK.

TYPEWRITING MACHINE.

Application filed. May 3, 1924. Serial No. 710,797.

To all whom it may concern:

Be it known that/I, EDWARD B. HESS, a citizen of the United States,residing at New York, in the county and State of-New York, have inventedcertain new and useful Improvements in Typewriting Machines, of whichthe following is a specification.

This invention relates tothe paper feed ing and guiding mechanism oftypewriting machines, In the Royal Standard. machine as heretoforemarketed, the paper is fed under the platen and held in yielding contacttherewith by a group of rolls mounted in frames which can be adjusted towithdraw the rolls from the platen when it is desired to arrange thepaper upon the platen. These combined feeding, guiding, and pressurerolls cooperate with pressure rolls which normally hold the paper, afterpassing 20 around the front of the platen, with a yielding pressure onthe upper portion of the platen. Means have heretofore been provided,and as shown in prior patents issued to the Royal Typewriter Company,Inc., for so moving these upper pressure and guiding rolls that they maybe changed from their normal or working osition on top of the platen toa position above and in rear of the platen and in rear of the papertable. In the Royal Standard machine, the top pressure rolls are mountedon a horizontally arranged rod extending from one end of the platen tothe other and beyond the ends thereof, and this rod is mounted in whatis known as a bail comprisingside arms or members which are pivotallyconnected with he carriage frame in rear of the platen and aconsiderable distance therefrom. These 'side arms of the bail are bracedby a rod which extends from one sidearm to the other, and springs areemployed for holding the rolls on the platen. While normally the bailholds the pressure rolls yieldingly and r with equal pressure upon theplaten, it sometimes happens thatin a careless use of the machine thebail is bentor misshaped so that-a pressure roll on one side of themachine bears with greater pressure on the platen than the roll on theopposite side thereof. It is the object of my present invention toremedy this difiiculty in such manner that even though the bail be bentor misshaped when in use, such ,irregularit-y will be compensatedautomatically.

In carrying out my invention I employ a bail as heretofore, but the rodwhich carries the ressure rolls is mounted in bearings whic permit therod to move vertically or radially'towards and from the platen andyielding devices, such as coiled springs, are arranged in the bearingsand exert pressure on the opposite ends of the rod tending at all timesto press the rolls toward the platen. These springs operateautomatically.

In the accompanying drawings I have shown fragmentary views of parts ofa typewriting machine embodying my improvements.

Figure 1 is a sectional view with parts in elevation, showing how myimprovements are applied to the bail which carries the upper pressurerolls.

Figure 2 is a detail view of some of'the parts shown in Figure 1.

Figure 3 is a view similar to Figure 1 showing a slight modification.

Figure 4 is a detail view of some of the parts shown in Figure 3.

Figure 5 is a view similar to-Figures 1 and 2 showing anothermodification and Figure 6 is a detail view of parts of the mechanismshown in Figure 5.

Parts of' a typewriting machine carriage frame are indicated at A, and Bindicates a platen. C indicates a shift rail and D a ball bearinginterposed between. the shift rail and the carriage rail E which has a;flange or lip e overhanging the bearing. The paper table is indicated atF and G indicates the paper pan or guide beneath the platen. The bailis.,indicated at H and as heretofore comprises side arms or members Kwhich are pivoted to the carriage frame at k. A spring L is connectedwith the side arm K at Z and with the carriage frame at Z. This springis so disposed and so connected with the carriage frame and with thebail that when the bail is in working position it'pulls the presat isure rolls R- with a yieldin pressure upon are adapted to rotate aboutthe axis of the rod and also to slide longitudinally thereon.

In Figure 1 the front end of the arm is provide with a vertical slot Nin which one end of the rod M is mounted as indi 'cated in Figure 2. Theend of the rod shown in Figure 2 is provided with a handle 0 whichprovides a convenient way of raising the bail. 'In the slot N above therod M is inserted a spring S which is a compression spring and tends tomove the rod downwardly in the slot. Both ends of the bar M are mountedin the manner indicated in Figures 1 and 2. The rolls R may be adjustedin the usual way. They rotate about the axis of the rod M as heretoforeand normally they bear with equal pressure upon the top of the platen,but it is obvious that should the bail or some of the members thereofbecome twisted or bent or should'the pivot. bearings of the bailbe'changed from their normal position, the rolls'R on opposite sides ofthe machine would notbear with equal pressure on the platen, but byemploying the spring bearingsgfor the rod M this contingency is met,because if the rod M is moved out of its parallel relation with theplaten so that the roll on one side of the machine is slightly raisedfrom the platen, the spring S on this side of the platen will move itback to: its proper position. The two springs S on opposite sides of thema- ,chineserve to automatically keep the rolls R in contact with theplaten when in work v ing position and preserve a uniform A pressure ofthe rolls on the platen.

The construction shown in Figures 3 and 4 .is substantially the same asthat shown in Figures 1 and 2 except that in this case the front ends ofthe bail arms are shaped some what differently, the slots N beinginclined upwardly and forwardly and pull springs S are employed, thefront end of each spring being connected with the rod M and the rear endof each spring being connected at s to a stop lu P on the bail arm K.

In Figure 5 t e construction is somewhat similar to that shown. inFigure 1, but in this case the slot N is inclined forwardly in themanner indicated in Figure 3, and the spring S which is similar to thatshown in Fi e 1' is arranged in this slot. In other respec theconstruction is the same as that heretofore described.

As indicated in Figure 6 the upper end of the-spring may bev made tobear against a lug n extending laterally from the arm K.

While I have shown the arm K as being formed with guide slots, otherforms of guides may be employed.

platen is of "9 shown is foun The relation of the pivots of the bailarms ractical importance. That to be most efficient.

I claim as my invention:

1. In a typewriting machine, the combination with the platen of upperpressure iolls, a rod on which the rolls are mounted, arms elongatedguides in their front ends in which the ends of the rod are mounted, anddevices acting upon the rod for yieldingly moving said rod with therolls towards the platen.

pivoted in rear of the platen and having 2. In a typewriting machine,the combiwhich the ends of the rod are mounted, and

devices acting upon the rod for yieldingly moving the rod with the rollstowards the platen.

3. In a typewriting machine, the combination with the platen of a set ofupper 90 pressure rolls mounted in a support movable towards and fromthe platen, and yielding devices in said support for movin the pressurerolls in their support towar the platen.

4. In a typewriting machine, the combination with the platen of armspivoted in rear of the platen, a set of pressure rolls mounted in saidarms, and yielding devices at the front end of said arms for moving thepressure rolls in their support toward the platen.

5. In a typewriting machine, the combi nation with the platen of aswinging frame having elongated guides in its front end above theplaten, a rod carrying pressure rolls having its ends mounted in saidguides, and a spring at the frontend of each arm engaging the rollcarrying rod and tending to move said rod with the rolls toward theplaten.

6. In a typewriting machine, the combinationwith the platen of a rollsupportin rod, a set of upper pressure rolls on said r a support for therod movable towards and from the platen about an axis in rear of theplaten, a spring for holding the support in normal. working position,and springs at the front end of the support operating upon the rollsupporting rod to move the rod and the rolls toward the platen.

7. In a typewriting machine, the combination with the platen of upperpressure rolls, a rod on which the rolls are mounted, arms pivoted inrear of the platen and havwhich the ends of the rod are mounted, lugsextending laterally from the front ends of the arms, and rings en a saidlu s and said rod f01 g gmg g with the rolls towards the laten.

In testimony whereof, have hereunto subscribed my name.

EDWARD B. HESS.

yieldingly moving the rod

